Cheistian olsen



(No Model.)

0. OLSEN;

A GANGWAY LADDER.

.348. Patented Dec. 18, 1883.

N. PETERS, Phmo-Linw n lm. Wu in mmac IINTTED STATES PATENT OFFICE.

CHRISTIAN OLSEN, OF ST. OHN, NEW BRUNSWICK.

GANGWAY -LADDER.

SPECIFICATION forming part of Letters Patent No. 290,348, dated December18, 1883.

Application filed October 20, I883. (No model.)

.To all whom it may concern Be it known that I, CHRISTIAN OLSEN, of

My invention relates to a gangway-ladder to connect the side of a vesselwith a wharf or dock, and a means for making this connection so thatfore and aft 01' other movements of the vessel will not cramp or injuretheladder.

It consists of a swivel-plate supported by an arm, which projects fromthe side of the vessel, and is fi rmly braced therefrom, an arm with abolt by which its center is connected with the centre of the plate, thetop of the ladder being journaled to the ends of the arm, and a hingedplatform by which an easy step is made between the side of the vesseland the ladder, together with a supporting-block upon which the platformrests, all of which will be more fully explained by reference to theaccompanying drawings, in which Figure 1 is a view of the device withpart of the side of a vessel and the gangway-ladder. Fig. 2 is a sideview.

A is the side of a vessel, and B is a strong bar or arm which projectsoutward at nearly or quite right angles, its outer end being supportedby a brace, O, hinged to it at D, and

cured by a nut below, so that it and the arm G may turn about the boltas a pivot, while the arm is held rigidly enough to act as asupport forthe upper end of the gangway stairs or ladder I, which is journaled uponthe ends of the arm G, so as to move up and down about it. By thisconstruction the ladder moves vertically about the'transverse arm G, toac commodate itself to the movements of the vessel as it rises and fallswith the tide, or from other causes. Any movements of the vessel foreand aft are allowed without strain upon theladder, by reason of thevertical pin or bolt H, through the center of the arm G, and aroundwhich it and the ladder may turn, being supported upon the plate. Inorder to connect the upper end of the ladder with the vessel, and coverthe space which is necessarily left to allow the movements of theladder, a platform, J, is hinged to the side of ,the vessel, and may belet down so as to extend out over the plate F. A block, K, is fixed toits lower surface, so as to rest upon the arm B, when the platform isturned down,

and it is thus supported independent of the ladder, but near enough sothat one can step to or from it easily, whatever may be the angle atwhich the ladder stands with relation to the vessel. The lower end ofthe ladder has the usual wheels or rollers where it runs upon the wharf.This mechanism is easily applied to any old ladder without materialchange.

Having thus described my invention, What I claim as new, and desire tosecure by Letters Patent, is-

I. An arm or bar projecting from and supportedby the vessels side, andhaving the horizontal plate at its outer end, in combination with ahorizontal bar, having a vertical pivot-bolt through its center and thatof the plate, and having its ends forming journals, upon which the upperends of the ladder turn, and about which it may have a vertical motion,substantially as herein described.

2. A gangway-ladder having its upper ends supported upon a swivel bar orplate, so as to have independent vertical and horizontal movements withrelation to the vessel, in combination with a platform hinged to theside of the vessel, and supported upon the arm independent from theladder, substantially as herein described.

In witness whereof I have hereunto set my hand.

CHRISTIAN OLSEN.

WVitnesses:

S. H. NoURsE, H. 0. LEE.

